232 citations · 1k across the 33 of their papers we have counts for
34 papers
Cascade of magnetic-field-induced quantum spin states in a spin-1 honeycomb magnet
Kaixin Tang, Zhao-Yang Dong, Yanyan Shangguan +10
Quantum fluctuations endow spin systems with surprisingly enriched magnetic phase diagrams. In frustrated magnets, strong quantum fluctuations boosted by either geometrical incompa…
Relationship between doping-induced in-gap states and spin excitations in Kitaev-Hubbard models
Si-Qi Hou, Shun-Li Yu, Zhao-Yang Dong +1
We investigate the connection between doping-induced in-gap states and underlying spin excitations in Mott insulators by employing cluster perturbation theory on one-dimensional (1…
Interaction-driven spin polaron in itinerant flat-band ferromagnetism
Wei-Tao Zhou, Zhao-Yang Dong, Jian-Xin Li
Interaction effects are dramatically enhanced in flat-band systems due to quenched kinetics, facilitating the binding of single excitations into composite quasiparticles. In this w…
Ligand-SOC enhanced Kitaev antiferromagnet: Application to
Li-Hao Xia, Yi-Peng Gao, Zhao-Yang Dong +1
The search for Kitaev quantum spin liquids (Kitaev-QSLs) in real materials has mainly focused on - and -electron honeycomb systems. A recent experimental study on the $4f^5…
Itinerant topological magnons and spin excitons in twisted transition metal dichalcogenides: Mapping electron topology to spin counterpart
Wei-Tao Zhou, Zhao-Yang Dong, Zhao-Long Gu +1
Twisted transition metal dichalcogenides (tTMDs) provide a highly tunable platform to explore the interplay between strong correlation and topology. Among them, the properties invo…
Possible gapless quantum spin liquid behavior in the triangular-lattice Ising antiferromagnet PrMgAlO
Zhen Ma, Shuhan Zheng, Yingqi Chen +12
Quantum spin liquids (QSLs) represent a novel state where spins are highly entangled but do not order even at zero temperature due to strong quantum fluctuations. Such a state is m…
Direct observation of topological magnon polarons in a multiferroic material
Song Bao, Zhao-Long Gu, Yanyan Shangguan +12
Magnon polarons are novel elementary excitations possessing hybrid magnonic and phononic signatures, and are responsible for many exotic spintronic and magnonic phenomena. Despite…
Observation of a 1/3 Magnetisation Plateau Phase as Evidence for the Kitaev Interaction in a Honeycomb-Lattice Antiferromagnet
Yanyan Shangguan, Song Bao, Zhao-Yang Dong +24
Fractional magnetisation plateaus, in which the magnetisation is pinned at a fraction of its saturated value within a range of external magnetic field, are spectacular macroscopic…
Magnon Damping as a Probe of Kondo Coupling in Magnetically Ordered Systems
Song Bao, Junsen Wang, Shin-ichiro Yano +13
In -electron systems, there can also be intricate interplay between Kondo coupling and magnetic interactions as that in -electron systems, but the underlying mechanism remain…
Spectrum of the hole excitation in spin-orbit Mott insulator NaIrO
Wei Wang, Zhao-Yang Dong, Shun-Li Yu +1
We study the motion of a hole with internal degrees of freedom, introduced to the zigzag magnetic ground state of NaIrO, by using the self-consistent Born approximation. We…
Defect-induced edge ferromagnetism and fractional spin excitations of the SU(4) -flux Hubbard model on honeycomb lattice
Yang Xie, Cheng-Ping He, Zhao-Yang Dong +1
Recently, a SU(4) -flux Hubbard model on the honeycomb lattice has been proposed to study the spin-orbit excitations of -ZrCl [Phys.~Rev.~Lett. 121.097201~(2017)]. Based…
Confinement and oscillating deconfinement crossover of two-magnon excitations in quantum spin chains quantified by spin entanglement entropy
Zhao-Yang Dong, Jian-Xin Li
We introduce the spin entanglement entropy (EE) to characterize spin excitations. The scalings of EEs are elaborated as , and for the single-magnon st…
Neutron spectroscopy evidence for a possible magnetic-field-induced gapless quantum-spin-liquid phase in a Kitaev material -RuCl
Xiaoxue Zhao, Kejing Ran, Jinghui Wang +15
As one of the most promising Kitaev quantum-spin-liquid (QSL) candidates, -RuCl has received a great amount of attention. However, its ground state exhibits a long-range zig…
Evidence for strong correlations at finite temperatures in the dimerized magnet NaCuTeO
Yanyan Shangguan, Song Bao, Zhao-Yang Dong +12
Dimerized magnets forming alternating Heisenberg chains exhibit quantum coherence and entanglement and thus can find potential applications in quantum information and computation.…
Disorder-induced broadening of the spin waves in a triangular-lattice quantum-spin-liquid candidate YbZnGaO
Zhen Ma, Zhao-Yang Dong, Jinghui Wang +15
Disorder is important in the study of quantum spin liquids, but its role on the spin dynamics remains elusive. Here, we explore the disorder effect by investigating the magnetic-fi…
Neutron spectroscopy evidence on the dual nature of magnetic excitations in a van der Waals metallic ferromagnet FeGeTe
Song Bao, Wei Wang, Yanyan Shangguan +12
In the local or itinerant extreme, magnetic excitations can be described by the Heisenberg model which treats electron spins as localized moments, or by the itinerant-electron mode…
Quantitative Determination of the Confinement and Deconfinement of spinons in the anomalous spectra of Antiferromagnets via the Entanglement Entropy
Zhao-Yang Dong, Wei Wang, Zhao-Long Gu +1
We introduce an entanglement entropy analysis to quantitatively identify the confinement and deconfinement of the spinons in the spin excitations of quantum magnets. Our proposal i…
Topological magnon insulator spin excitations in the two-dimensional ferromagnet CrBr
Zhengwei Cai, Song Bao, Zhao-Long Gu +17
Topological magnons are bosonic analogues of topological fermions in electronic systems. They have been studied extensively by theory but rarely realized by experiment. Here, by pe…
Disorder-induced spin-liquid-like behavior in kagome-lattice compounds
Zhen Ma, Zhao-Yang Dong, Si Wu +14
Quantum spin liquids (QSLs) are an exotic state of matter that is subject to extensive research. However, the relationship between the ubiquitous disorder and the QSL behaviors is…
Fractionalized Spin Excitations in the Edge Ferromagnetic State of Graphene: Signature of the Ferromagnetic Luttinger Liquid
Zhao-Yang Dong, Wei Wang, Zhao-Long Gu +2
The elementary excitations from the conventional magnetic ordered states, such as ferromagnets and antiferromagnets, are magnons. Here, we elaborate a case where the well-defined m…
Evidence for magnon-phonon coupling in the topological magnet CuTeO
Song Bao, Zhengwei Cai, Wenda Si +11
We perform thermodynamic and inelastic neutron scattering (INS) measurements to study the lattice dynamics (phonons) of a cubic collinear antiferromagnet CuTeO which hosts…
Spin dynamics of a magnetic Weyl semimetal SrMnSb
Zhengwei Cai, Song Bao, Wei Wang +12
Dirac matters provide a platform for exploring the interplay of their carriers with other quantum phenomena. SrMnSb has been proposed to be a magnetic Weyl semi…
Itinerant topological magnons in Haldane Hubbard model with a nearly-flat electron band
Zhao-Long Gu, Zhao-Yang Dong, Shun-Li Yu +1
We elaborate the first theoretical realization of two dimensional itinerant topological magnons, based on the quarter filled Haldane-Hubbard model with a nearly-flat electron band.…
Ferromagnetism and spin excitations in topological Hubbard models with a flatband
Xiao-Fei Su, Zhao-Long Gu, Zhao-Yang Dong +2
We study the spin-1 excitation spectra of the flatband ferromagnetic phases in interacting topological insulators. As a paradigm, we consider a quarter filled square lattice Hubbar…